Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism
Selenium (Se) uptake by primary producers is the most variable and important step in determining Se concentrations at higher trophic levels in aquatic food webs. We gathered data available about the Se bioaccumulation at the base of aquatic food webs and analyzed its relationship with Se concentrati...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/9/4/528 |
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| author | Dominic E. Ponton Stephanie D. Graves Claude Fortin David Janz Marc Amyot Michela Schiavon |
| author_facet | Dominic E. Ponton Stephanie D. Graves Claude Fortin David Janz Marc Amyot Michela Schiavon |
| author_sort | Dominic E. Ponton |
| collection | DOAJ |
| description | Selenium (Se) uptake by primary producers is the most variable and important step in determining Se concentrations at higher trophic levels in aquatic food webs. We gathered data available about the Se bioaccumulation at the base of aquatic food webs and analyzed its relationship with Se concentrations in water. This important dataset was separated into lotic and lentic systems to provide a reliable model to estimate Se in primary producers from aqueous exposure. We observed that lentic systems had higher organic selenium and selenite concentrations than in lotic systems and selenate concentrations were higher in lotic environments. Selenium uptake by algae is mostly driven by Se concentrations, speciation and competition with other anions, and is as well influenced by pH. Based on Se species uptake by algae in the laboratory, we proposed an accurate mechanistic model of competition between sulfate and inorganic Se species at algal uptake sites. Intracellular Se transformations and incorporation into selenoproteins as well as the mechanisms through which Se can induce toxicity in algae has also been reviewed. We provided a new tool for risk assessment strategies to better predict accumulation in primary consumers and consequently to higher trophic levels, and we identified some research needs that could fill knowledge gaps. |
| first_indexed | 2024-03-10T20:22:23Z |
| format | Article |
| id | doaj.art-9c76f37c13a847d8aab1f2379514483d |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T20:22:23Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-9c76f37c13a847d8aab1f2379514483d2023-11-19T22:06:06ZengMDPI AGPlants2223-77472020-04-019452810.3390/plants9040528Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular MetabolismDominic E. Ponton0Stephanie D. Graves1Claude Fortin2David Janz3Marc Amyot4Michela Schiavon5GRIL, Département des Sciences Biologiques, Université de Montréal, Montreal, QC H2V 0B3, CanadaToxicology Graduate Program, University of Saskatchewan, Saskatoon, SK S7N 5B3, CanadaEcotoQ, Institut National de la Recherche Scientifique, Centre Eau, Terre et Environnement, QC G1K 9A9, CanadaDepartment of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK S7N 5B4, CanadaGRIL, Département des Sciences Biologiques, Université de Montréal, Montreal, QC H2V 0B3, CanadaDAFNAE Department, Università degli Studi di Padova, 35020 Legnaro, ItalySelenium (Se) uptake by primary producers is the most variable and important step in determining Se concentrations at higher trophic levels in aquatic food webs. We gathered data available about the Se bioaccumulation at the base of aquatic food webs and analyzed its relationship with Se concentrations in water. This important dataset was separated into lotic and lentic systems to provide a reliable model to estimate Se in primary producers from aqueous exposure. We observed that lentic systems had higher organic selenium and selenite concentrations than in lotic systems and selenate concentrations were higher in lotic environments. Selenium uptake by algae is mostly driven by Se concentrations, speciation and competition with other anions, and is as well influenced by pH. Based on Se species uptake by algae in the laboratory, we proposed an accurate mechanistic model of competition between sulfate and inorganic Se species at algal uptake sites. Intracellular Se transformations and incorporation into selenoproteins as well as the mechanisms through which Se can induce toxicity in algae has also been reviewed. We provided a new tool for risk assessment strategies to better predict accumulation in primary consumers and consequently to higher trophic levels, and we identified some research needs that could fill knowledge gaps.https://www.mdpi.com/2223-7747/9/4/528algaeseleniumcompetitionsulfatepartition coefficientselenate |
| spellingShingle | Dominic E. Ponton Stephanie D. Graves Claude Fortin David Janz Marc Amyot Michela Schiavon Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism Plants algae selenium competition sulfate partition coefficient selenate |
| title | Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism |
| title_full | Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism |
| title_fullStr | Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism |
| title_full_unstemmed | Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism |
| title_short | Selenium Interactions with Algae: Chemical Processes at Biological Uptake Sites, Bioaccumulation, and Intracellular Metabolism |
| title_sort | selenium interactions with algae chemical processes at biological uptake sites bioaccumulation and intracellular metabolism |
| topic | algae selenium competition sulfate partition coefficient selenate |
| url | https://www.mdpi.com/2223-7747/9/4/528 |
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